Shiba, a wandering ronin, encounters a band of peasants who have kidnapped the daughter of their dictatorial magistrate, in hopes of coercing from him a reduction in taxes. Shiba takes up their fight, joined by two renegades from the magistrate's guard, Sakura and Kikyo. The three outlaws find themselves in a battle to the death.

Peace in 17th-century Japan causes the Shogunate's breakup of warrior clans, throwing thousands of samurai out of work and into poverty. An honorable end to such fate under the samurai code is ritual suicide, or hara-kiri (self-inflicted disembowelment). An elder warrior, Hanshiro Tsugumo (Tatsuya Nakadai) seeks admittance to the house of a feudal lord to commit the act. There, he learns of the fate of his son-in-law, a young samurai who sought work at the house but was instead barbarically forced to commit traditional hara-kiri in an excruciating manner with a dull bamboo blade. In flashbacks the samurai tells the tragic story of his son-in-law, and how he was forced to sell his real sword to support his sick wife and child. Tsugumo thus sets in motion a tense showdown of revenge against the house.

When an American space capsule is swallowed up by what they believe to be a Russian spaceship, World War 3 nearly breaks out. The British Government, however, suspect that other powers are at work as the space craft went down near Japan. S.P.E.C.T.R.E. is the force behind the theft, as James Bond discovers, but its motives are far from clear, and he must first find out where the captured space capsule is held before America and Russia initiate another world war.